Home / 20,803.12-28,708.32-11,371.69

Finding the Fourth Proportional to 20,803.12, 28,708.32 and 11,371.69

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Solution

The fourth proportional to 20,803.12, 28,708.32 and 11,371.69 is: 15,692.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.12 : 28,708.32 = 11,371.69 : x
  2. Step 2: Convert to fraction form
    20,803.12/28,708.32 = 11,371.69/x
  3. Step 3: Cross multiply
    20,803.12x = 28,708.32 × 11,371.69
  4. Step 4: Simplify right side
    20,803.12x = 326,462,115.46
  5. Step 5: Solve for x
    x = 326,462,115.46/20,803.12
  6. Step 6: Final answer
    x = 15,692.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.